Very interesting.

I too have had similar dreams/visions, and like you, I'm not certain whether they are "my" memories, or whether I am simply tapping into the collective conscious. But several have been recurring, so clearly I have greater identification with some periods and locales over others.

As just one example, I have always been very drawn to ancient Greece, and I've always had more of an antipathy toward ancient Rome, even though I have memories/visions of having been both Greek and Roman, at various times, and of having been both male and female.

That said, having a fair knowledge of European history in the time of the plagues, I find your theory of the advent of the zombie mythos to be entirely credible and even likely.

And zombie-like creatures occur in many cultures, all over the world, and have never been restricted to African voodoo practices, as much as some people would choose to make it so.

Thanks again for a very interesting read.